(04-21) 04:00 PDT Sacramento -- Californians would have to buy cleaner gasoline and more efficient lightbulbs and face a new ban on a chemical backyard mechanics use to replenish air conditioners in cars under the first proposals aimed at meeting the state's landmark law to reduce greenhouse gases.

State regulators on Friday released a list of changes that could be implemented by 2010 to begin California's march toward its 2020 global warming target. The list -- and the reaction it garnered -- previewed what will likely be years of wrangling among regulators and interest groups.

Environmentalists complained that the state wasn't moving fast enough, and a representative of the makers of air conditioners for vehicles vowed to fight the change that would affect the auto refrigerant industry.

AB32, the law signed last year by Gov. Arnold Schwarzenegger, calls for a 25 percent reduction in carbon dioxide and other greenhouse gas emissions by 2020. But the law also requires earlier changes, and Schwarzenegger administration officials and regulators with the state Air Resources Board released a preliminary set of changes.

This blog is part of the ongoing work of the American River Parkway Preservation Society to provide public education and advocacy around public policy issues that may be related to the Parkway and the adjacent communities along the American River in Sacramento, California.